1.6. Main Objective of the Module

Try these first

1. 1.

   Define a fluid in your own words.

   Hint

   Think about how liquids and gases behave differently than solids.

2. 2.

   What is viscosity?

   Hint

   Consider how honey flows compared to water.

3. 3.

   What defines a fluid?

   • A substance that resists shear
   • A substance that deforms continuously under shear
   • A solid that flows

   Hint

   Think about how fluids behave under force.

4. 4.

   True or False: Viscosity only applies to liquids.

   • True
   • False

   Hint

   Consider both liquids and gases in your assessment.

5. 5.

   A fluid in a pipe is flowing steadily. Calculate the change in velocity if the diameter of the pipe is halved.

   Hint

   Consider how conservation of mass applies here.

6. 6.

   Explain the relationship between shear stress and viscosity in a practical example of oil.

   Hint

   Think about pouring different oils.